I have had very nice French co-workers in Finland, but I was surprised, after living in Brussels, how different is the Parisian temperament to that prevalent here.
First of all, the service tends to be very rude (which is, of course, something I'm sure you've heard before). However, the good news was that I didn't have many problems speaking French. Either my pronunciation has improved or they have gotten more used to foreigners badly mangling their language.
I was also really surprised, given that my co-workers were so easy-going, to confirm that Parisians tend to be rather proud. That is quite a difference from Brussels, where people tend to be really easy-going, and a little bit on the humble side.